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Finding the Fourth Proportional to 153,937.05, 212,431.08 and 85,955.16

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Solution

The fourth proportional to 153,937.05, 212,431.08 and 85,955.16 is: 118,616.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,937.05 : 212,431.08 = 85,955.16 : x
  2. Step 2: Convert to fraction form
    153,937.05/212,431.08 = 85,955.16/x
  3. Step 3: Cross multiply
    153,937.05x = 212,431.08 × 85,955.16
  4. Step 4: Simplify right side
    153,937.05x = 18,259,547,470.37
  5. Step 5: Solve for x
    x = 18,259,547,470.37/153,937.05
  6. Step 6: Final answer
    x = 118,616.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.